My all time fav sealer is the Minwax Woodhardner. BUT, it's dangerous in the house or without super ventilation. I use Helmsman Urethane cut with mineral spirits. The mix depends on the wood's absorbtion rate. Day or two dry time. Happy so far.
He that would make his own liberty secure, must guard even his enemy from oppression; for if he violates this duty, he establishes a precedent that will reach to himself.
Thomas Paine